Geography

What is meant by BM 224 in grid square 4485?

What is meant by BM 224 in grid square 4485? Interpretation of Topographical Maps, Geography by Veena Bhargava Goyal Brothers Prakashan ICSE Class 10.
  1. It is Bench Mark, cut on a rock wall or a building showing the height of that mark above sea level is 224 m
  2. It is Benchmark, 224 m above sea level
  3. The height of the point where it is written
  4. It is the height of the sand dune above sea level

Topographical Maps

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Answer

It is Bench Mark, cut on a rock wall or a building showing the height of that mark above sea level is 224 m

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